Experimental and numerical research on opening size effect of novel short fiber reinforced composite laminates

• DOI: 10.1016/j.rinp.2023.106303
• Publication Date: 2023-02-22T04:13:22Z
• Authors: Xutong Zhang; Junfeng Hu; Rui Qian; Yifan Wang; Sudong Yu; Yinyuan Huang; Zhou Chen; Dingding Chen; Siqi Zhang; Felix Thompson EShun; Jingxuan Ma; Wenlong Lu
• Keywords: Delamination; Carbon fiber composite; Strength reduction

This study investigates the opening size effect of a novel short fiber reinforced quasi-isotropic composite laminate with unidirectionally arrayed chopped strands (UACS) under tensile load by approaches simulations and experiments. The layup [45/0/-45/90]s was used to fabricate carbon laminates various central hole diameter from 4 mm 10 mm. Low notch sensitivity strength reduction rate were observed in UACS open-hole laminates. It found that when width ratio (d/w) is less than 20%, 80% original can be maintained, which greatly reduce design safety factor. Compared continuous laminates, high increase induced bi-angled slits increasing open diameter. strain distribution around affected significantly slits, also inhibited initiation propagation delamination effectively. concentration factor increases damage progression notched unnotched analyzed simulation method, are consistent well experimental results.